<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
    </head>
    <body>
       <center><h1> Hello World!</h1></center>
       <h2>hello world!</h2>
       <a href="login.html">登录</a>
       <img src="1.jpeg"/> 
       <input> <input type="password"> <br>
       <input type="radio"> 男
       <input type="checkbox"> 女
      
       <table border="1">
        <tr>
        <td>row 1, cell 1</td>
        <td>row 1, cell 2</td>
        </tr>
        <tr>
        <td>row 2, cell 1</td>
        <td>row 2, cell 2</td>
        </tr>
        </table>
    </body>
</html>